423066779 has 4 divisors (see below), whose sum is σ = 424171776. Its totient is φ = 421961784.

The previous prime is 423066773. The next prime is 423066793. The reversal of 423066779 is 977660324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423066779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423066773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551924 + ... + 552689.

It is an arithmetic number, because the mean of its divisors is an integer number (106042944).

Almost surely, 2^423066779 is an apocalyptic number.

423066779 is a deficient number, since it is larger than the sum of its proper divisors (1104997).

423066779 is a wasteful number, since it uses less digits than its factorization.

423066779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104996.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 423066779 is about 20568.5871901791. The cubic root of 423066779 is about 750.7055754170.

The spelling of 423066779 in words is "four hundred twenty-three million, sixty-six thousand, seven hundred seventy-nine".